In the US, there was only one motor from 1928 to 1931. 200 cubic inches, 40 hp. I don't know where the 2 liter idea came from, but it wasn't in the US.
All of your examples are of 1930/1931 Model As. It might be nice to have some examples of 28/29 cars and/or trucks which are characterized by the character line on the cowl sides (narrower interior) and the